#!/usr/bin/env python
# -*- coding: UTF-8 -*-
# Created by eeliu at 8/20/20

# ******************************************************************************
#   Copyright  2020. NAVER Corp.
#
#   Licensed under the Apache License, Version 2.0 (the "License");
#   you may not use this file except in compliance with the License.
#   You may obtain a copy of the License at
#
#       http://www.apache.org/licenses/LICENSE-2.0
#
#   Unless required by applicable law or agreed to in writing, software
#   distributed under the License is distributed on an "AS IS" BASIS,
#   WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
#   See the License for the specific language governing permissions and
#   limitations under the License.
# ******************************************************************************

class Interceptor:
    def __init__(self, scope, point, handle):
        assert isinstance(point,str)
        self.full_name = scope.__module__+'.'+point
        self.point = point
        # new a handle and bind on full_name
        self.handle = handle(self.full_name)
        self.scope = scope
        self.origin_point = getattr(scope,point)

    def enable(self):
        assert callable(self.handle)
        setattr(self.scope, self.point, self.handle(self.origin_point))

    def disable(self):
        setattr(self.scope, self.point, self.origin_point)